JPS59159199A - Light output semiconductor device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to semiconductor devices that produce optical output. Light output semiconductor devices such as L-EDs are widely used in display panels and the like. However, although light output semiconductors such as LEDs themselves have become smaller and more dense,
The arrangement and connection with the small moving device that drives it is complicated, making it difficult to obtain a compact display manufacturing device.

The present invention provides information on real data in a highly densely arranged T
It is an object of the present invention to provide a semiconductor device that can output parallel ED outputs.

Next, an embodiment of the present invention will be described with reference to the drawings. , FIG. 1 shows the configuration of a semiconductor device of the present invention.

In Figure 1 (hereinafter LED array) 1 is L with the same characteristics.
EDs are arranged in a line at equal intervals, and are driven all at once by the same number of LED drive signals as the LEDs, so that serial input data is taken out in parallel as an LED output signal (1). In Figure 1, the LED eyes are NO1, 2, 3 from the left. ..., 2i-1, 2i, and an array of 2i LEDs is shown. L
The ED drivers 2 and 3 are for converting serial input data into parallel outputs for driving the LED array 1 using control signals such as shift clock pulses and LED pulses, and have one driver output 01 to 01. are doing. The board 4 is equipped with an LED array 1 and two LED drivers 2.3, and is connected to the input/output signals of this device and the LED array.
This is a useless item for pattern wiring between LED drivers. In order to facilitate wiring connection to the high-density LED array 1, the LED driver outputs are divided into even-numbered LEDs and b-th LEDs. N01, 02 is N
o3 and 03 are connected to the odd numbered NO LEDs of the LED array in that order up to the output of Oi, respectively. For each output of LED driver 3, 01 is L
ED array No2i, 02ba No2(i-1),
03 is connected to the LFD of No. 2 (i-2), and so on, and the output of 01 is connected to the LED of even number No. in that order.

Next, a method for extracting parallel outputs as i LED drive signals from one piece of serial input data using the LED drivers 2 and 3 will be described.

As shown in FIG. 2, the LED driver 2 is composed of a one-stage bidirectional shift register 5, a latch section 6, and a driver section 7, and each of the latch section 6 and driver section 7 includes one latch circuit,
It consists of a drive circuit.

The serial input data of five bidirectional shift registers is shifted one stage at a time by a shift clock pulse, and the shifted data is held. In one case, the first data is held in the first stage register of the last stage by the i-generated shift clock pulse, and the last i-th serial input data is held in the first stage register. It is possible to use the system in two ways: one is to hold the last i-th input data in the first-stage register, and the other is to have the final stage register hold the i-th input data. In FIG. 1, the LED driver 2 is used in the former shift direction, and the LED driver 3 is used in the latter shift direction.

1 held in the bidirectional shift register 5 in FIG.
These outputs are connected to a launch section 6 having one latch circuit, and are set in the launch section at the same timing by a set pulse. The outputs of the launch section 601 are connected to the driver section 7 having one driver circuit.

Therefore, i pieces of serial input data are held in the input order in the i-stage bidirectional shift register 5 by one shift clock pulse, and one piece of held data is latched by the latch part 6 by the set pulse, and one piece of serial input data from driver d1 is 01~O
1 parallel LED drive output can be obtained.

Therefore, the LED driver 2 is provided with serial data aimed at the odd-numbered LED outputs of the LED array 1.
Serial data corresponding to even-numbered LED outputs is input to the driver 3, and by configuring it as shown in Figure 1 and using the LED drivers 2 and 3 with the data shift directions reversed, one type of LED driver can be used. Driver and LED
It is possible to create a semiconductor device in which the wiring of the array is arranged in a cylinder, and the serial data corresponding to the even-numbered outputs and the serial data corresponding to A to the odd-numbered outputs are output as LED outputs in parallel on the LED array.

As explained above, the present invention consists of an LED array and two identical LED drivers as shown in Fig. 1, outputs two types of serial input data to the LEDs, converts it into parallel information, and creates a high-density LED array. This has the effect of making it possible to connect to ←.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the configuration of a semiconductor device of the present invention, and FIG. 2 is a diagram showing a block diagram of an LED driver. 1...LED/array, 2...LED/driver, 3...
...LED/driver, 4...Kiban, 5...Bidirectional/shift register, 6...Latch section, 7...Driver section.

Claims (1)

[Claims] 1. A light output semiconductor device, comprising a driver section including a bidirectional shift register to obtain a parallel output from a parallel input, and an array of light output semiconductors.